We have been following the TorqueBox project for a while now, and version 1.0 is finally available.
TorqueBox enhances the JBoss 6 Application Server, with goodies lick built-in messaging, clustering., job scheduling, and a sweet feature (“StompBox”) that provides Heroku-like rapid deplyment via Git.
See in particular these links:
We have been using the GA JBoss and JBoss Enterprise for a good while know with JRuby, Rails and Hobo to great success. JRuby exposes Java classes to Ruby, so we can easily integrate with Java libraries such as Mondrian and the Central Authentication Service (CAS).
We hope to test TorqueBox soon and will report back with our experience.